Stove-pipe thimble



(No Model.) v

M. J. FAHEY.

STOVE PIPE THIMBLE;

No. 464,609. PatentedDec. 8, 1891.

UNITED STATES PATENT OFFICE.

MICHAEL J. FAHEY, OF FORT MADISON, IOIVA.

STOVE-PIPE THIMBLE.

SPECIFICATION forming part of Letters Patent No. 464,609, dated December8, 1891. Application filed June 7, 1890. Serial No. 354,591. (No model.)

To all whom it may concern:

Be it known that 1, MICHAEL J. FAHEY, a citizen of the United States,residing at Fort Madison, in the county of Lee and State of Iowa, haveinvented a new and useful Stove- Pipe Thimble, of which the following is-a specification.

My invention is an improvement in stovepipe thimbles, and has for itsobject to provide a thimble which will be fire-proof.

With this object in view the invention residesin the details ofconstruction and in the combination of parts hereinafter fullydescribed, and particularly pointed out in the claim at the end of thisspecification.

In the drawings illustrating my invention, forming part of thisspecification, in which like letters and numbers of reference indicatecorresponding parts in all the views, Figure 1 is a verticallongitudinal section of my fireproof thimble. Fig. 2 is a plan view ofthe upper annular cap thereof, and Fig. 3 is a similar view of the lowerannular cap.

In the drawings, A designates the outer cylinder, made of earthenware,fire-clay, iron, stone, asbestus, or the like.

13 indicates the inner cylinder of metal or the like, C the upperannular cap, D the lower annular cap, and E the air-space between thetwo cylinders. The upper annular cap (Jis provided with a sleeve 0,which fits over the end of the outer cylinder A. The lower annular cap Dhas its edges spun over the other end of the outer cylinder A. The wholeis fastened together by means of the inner cylinder B, which has theedges at its upper end spun over and preferably soldered to the inner.rim of the upper annular cap (3, and likewise the edges at its lowerend are spun over and preferably soldered to the inner rim of the lowerannular cap D. However, even though the soldering should be omitted, theupper cap 0 will be supported by its outer rim, the inner cylinder willbe supported by its'upper spun end over said cap, while its lower spunend will support the lower cap D, and the latter will support the outercylinder. Thus the whole device will be held together and in positionwithout the necessity for solder or bolts or rivets. O and D haveperforations e to provide ventilation for the air-space E, and theseperforations may be and by preference are in alignment with each otherto increase slightly the volume of air which passes through the thimblein a given time.

It will be understood that while my improved thimble may be used in anumber of places where stove-pipes or other fines or heatconductors passthrough floors, ceilings, walls, roofs, and the like it is principallydesigned to surround stove pipes where they pass through the ceiling ofone room into another room. In this position it serves the followingfunctions: It providesa means of ventilation through the perforations eand the air-space E. It allows such foreign matter as may fall into theperforations in the upper annular cap to pass through the perforation inthe lower one. It guards against accidental fire caused by overheatingof the inner cylinder B by providing the air-space E between said innercylinder and the wood-work or other material of the house liable tocatch fire and by the fire-proof and non-conducting nature of the outercylinder A, which may be in immediate contact with such materials. Italso provides a heating device whereby the temperature of the upper roommay be raised by the air passing through the perforations e and theair-space E at the same time lowering the temperature of the thimble.

Instead of fastening the parts together, as described, I may connect theannular end caps O and D by means of rods or bolts, and thus dispensewith the necessity of soldering.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The herein-described stove-pipe thimble, comprising an annular upper capC, having an outer supporting-rim and a depending sleeve, an innercylinder B, having outwardlyspun ends arranged at an angle, the upper ofwhich engages the inner edge of said cap, a lower annular cap D, engagedby the lower spun end and its outer edge being spun upwardly, and anouter fire-proof cylinder A,

The two annular caps its lower end engaged by said spun edge and my ownI have hereto affixed my signature in its upper end arranged lnside saidsleeve, the presence of two Witnesses.

c *linders bein concentric and formin an v t 1 aimular space TE, and thecaps having p erfo- MICHAEL LAHEL 5 rations opening into the ends ofthis space, Witnesses:

as set forth. ORREN I. SEARLES,

In testimony that I claim the foregoing as l FRANK M. GUSTIN.

